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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash flows from operating activities:    
Net income $ 7,543 $ 7,429
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 2,933 2,982
Pension expense 760 761
Stock based compensation 682 836
Changes in operating assets and liabilities:    
Accounts receivable, net (9,211) (3,576)
Inventories, net (4,315) 3,073
Accounts payable 2,256 3,397
Commissions payable 727 (771)
Deferred revenue and customer deposits 1,253 711
Income taxes 1,912 986
Accrued expenses and other 668 (1,296)
Benefit obligations 957 (850)
Net cash provided by operating activities 6,165 13,682
Cash used for investing activities:    
Capital additions (3,473) (864)
Other 89 516
Net cash used for investing activities (3,384) (348)
Cash used for financing activities:    
Cash dividends (4,436) (4,047)
Treasury share repurchases (918) (231)
Other (32) (627)
Net cash used for financing activities (5,386) (4,905)
Effect of exchange rate changes on cash 97 (118)
Net increase (decrease) in cash and cash equivalents (2,508) 8,311
Cash and cash equivalents:    
Beginning of period 125,194 108,203
End of period $ 122,686 $ 116,514